40 software professionals were interviewed for a job. 25 knew PYTHON 20 knew…
2024
40 software professionals were interviewed for a job. 25 knew PYTHON 20 knew JAVA and 7 knew neither language. How many knew both languages?
- A.
20
- B.
53
- C.
12
- D.
88
Attempted by 54 students.
Show answer & explanation
Correct answer: C
Use inclusion-exclusion.
Total professionals = 40.
Neither language = 7, so at least one language = 40 - 7 = 33.
Let x be the number who knew both Python and Java.
25 + 20 - x = 33
x = 45 - 33 = 12
Final answer: 12 professionals knew both languages.
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